Re: [PATCH 1/5] libata: improve ata_down_xfermask_limit()

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Tejun Heo wrote:
Make ata_down_xfermask_limit() accept @sel instead of @force_pio0.
@sel selects how the xfermask limit will be adjusted.  The following
selectors are defined.

* ATA_DNXFER_PIO	: only speed down PIO
* ATA_DNXFER_DMA	: only speed down DMA, don't cause transfer mode change
* ATA_DNXFER_40C	: apply 40c cable limit
* ATA_DNXFER_FORCE_PIO	: force PIO
* ATA_DNXFER_FORCE_PIO0	: force PIO0 (same as original with @force_pio0 == 1)
* ATA_DNXFER_ANY	: same as original with @force_pio0 == 0

Currently, only ANY and FORCE_PIO0 are used to maintain the original
behavior.  Other selectors will be used later to improve EH speed down
sequence.

Signed-off-by: Tejun Heo <htejun@xxxxxxxxx>
---
 drivers/ata/libata-core.c |  105 ++++++++++++++++++++++++++++++++++-----------
 drivers/ata/libata-eh.c   |    9 +++-
 drivers/ata/libata.h      |   12 +++++-
 3 files changed, 96 insertions(+), 30 deletions(-)

applied 1-4


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